package app.utils;

import org.springframework.beans.factory.DisposableBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.annotation.Lazy;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;

/**
 * Utils - Spring
 * 
 */
@Component("springUtils")
@Lazy(false)
public final class SpringUtils implements ApplicationContextAware, DisposableBean {

    /** applicationContext */
    private static ApplicationContext applicationContext;


    /**
     * 不可实例化
     */
    private SpringUtils() {
    }

    public void setApplicationContext(ApplicationContext applicationContext) {
        SpringUtils.applicationContext = applicationContext;
    }

    public void destroy() throws Exception {
        applicationContext = null;
    }

    /**
     * 获取applicationContext
     * 
     * @return applicationContext
     */
    public static ApplicationContext getApplicationContext() {
        return applicationContext;
    }

    /**
     * 获取实例
     * 
     * @param name Bean名称
     * @return 实例
     */
    public static Object getBean(String name) {
        Assert.hasText(name);
        return applicationContext.getBean(name);
    }

    /**
     * 获取实例
     * 
     * @param name Bean名称
     * @param type Bean类型
     * @return 实例
     */
    public static <T> T getBean(String name, Class<T> type) {
        Assert.hasText(name);
        Assert.notNull(type);
        return applicationContext.getBean(name, type);
    }

    /**
     * 获取实例
     *
     * @param type Bean类型
     * @return 实例
     */
    public static <T> T getBean(Class<T> type) {
        Assert.notNull(type);
        return applicationContext.getBean(type);
    }

    // /**
    // * 获取国际化消息
    // *
    // * @param code 代码
    // * @param args 参数
    // * @return 国际化消息
    // */
    // public static String getMessage(String code, Object... args) {
    // LocaleResolver localeResolver = getBean("localeResolver", LocaleResolver.class);
    // Locale locale = localeResolver.resolveLocale(null);
    // return applicationContext.getMessage(code, args, locale);
    // }


}